body {
  text-align: center;
}
header {
  height: 3.4em;
  margin: 0 auto;
  padding: 10px;
  vertical-align: middle;
  border: 1px solid #eee;
  margin-bottom: 2em;
}
.pure-menu-heading {
  float: left;
}
.pure-menu-list {
  float: right;
}
.canvasgroup {
  border-bottom: 1px solid #eee;
  padding-bottom: 1em;
}
#source,
#result {
  padding: 4px;
  width: 300px;
  height: 300px;
}
#source,
#result,
#wave {
  border: 4px solid #eee;
  box-shadow: 0 0 4px #888;
  border-radius: 5px;
}
#wave {
  width: 100%;
  box-sizing: border-box;
}
form[name='passform'] {
  text-align: left;
}
input[type='range'] {
  width: 300px;
}
p {
  line-height: 2em;
  padding: 0 2em;
  text-align:start;
  text-indent:2em;
  letter-spacing:0.1em;
}
